/******************************************************************************
* BIKE -- Bit Flipping Key Encapsulation
*
* Copyright (c) 2017 Nir Drucker, Shay Gueron, Rafael Misoczki, Tobias Oder, Tim Gueneysu
* (drucker.nir@gmail.com, shay.gueron@gmail.com, rafael.misoczki@intel.com, tobias.oder@rub.de, tim.gueneysu@rub.de)
*
* Permission to use this code BIKE is granted.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
*   this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
*   notice, this list of conditions and the following disclaimer in the
*   documentation and/or other materials provided with the distribution.
*
* * The names of the contributors may not be used to endorse or promote
*   products derived from this software without specific prior written
*   permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ""AS IS"" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS CORPORATION OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/

#ifndef _OSSL_UTILITIES_H_
#define _OSSL_UTILITIES_H_

#include "types.h"

OQS_STATUS ossl_add(OUT uint8_t res_bin[R_SIZE],
                    IN const uint8_t a_bin[R_SIZE],
                    IN const uint8_t b_bin[R_SIZE]);

// Perform cyclic product by using OpenSSL
OQS_STATUS cyclic_product(OUT uint8_t res_bin[R_SIZE],
                          IN const uint8_t a_bin[R_SIZE],
                          IN const uint8_t b_bin[R_SIZE]);

OQS_STATUS ossl_split_polynomial(OUT uint8_t e0_bin[R_SIZE],
                                 OUT uint8_t e1_bin[R_SIZE],
                                 IN const uint8_t e_bin[N_SIZE]);

// Perform modular inverse with OpenSSL
OQS_STATUS ossl_mod_inv(OUT uint8_t res_bin[R_SIZE],
                        IN const uint8_t a_bin[R_SIZE]);

#endif // _OSSL_UTILITIES_H_
